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Codédex
GoIT LMS
Codelita
Data Protocol
codedamn
Codecademy
Programming exercises for experienced engineers.

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Automate your document workflows with Chaindoc. Collect tamper-evident signatures, monitor every action, and verify agreements on-chain in seconds.
Which is more popular?
Based on our record, CodeCrafters seems to be more popular. It has been mentioned 12 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | codecrafters.io | chaindoc.io |
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Recommendations tracked on public social media and blogs since March 2021.


This whole thing started as a CodeCrafters challenge. What was supposed to be a quick weekend project turned into me staring at dup2() man pages at 2 AM, wondering why my pipes were freezing the whole terminal. Good times. - Source: dev.to / 3 days ago
Sometime ago, I decided to embark on a new endeavor, I was curious about how shell works, and came across the the codecrafters.io build your own shell challenge, and thought this is a good opportunity for me to learn shell, as well as... - Source: dev.to / 22 days ago
Submitting with git push also exists at CodeCrafters, for code you write from scratch. - Source: dev.to / about 1 month ago
Tracking Chaindoc since Oct 2025.
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